Final answer:
Facial recognition and security-enhancing technologies need to be balanced with considerations for privacy and the potential for government or business abuse.
Step-by-step explanation:
The most important idea in this section of the passage is that facial recognition and other technological tools are not inherently bad, but their emergence necessitates careful consideration regarding privacy, their usage, and the potential for abuse by governments and businesses. The technologies, like two-factor authentication and the possibility of using brainwaves for security, offer increased security for both individuals and organizations. However, there is a need for vigilance to ensure that the collection and retention of data do not infringe on individual freedoms and privacy.